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jdk/src/hotspot/share/code/codeBlob.cpp
Kim Barrett e8a1a8707e 8369186: HotSpot Style Guide should permit some uses of the C++ Standard Library 
Reviewed-by: jrose, lkorinth, iwalulya, kvn, stefank
2025-11-02 07:02:06 +00:00

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/*
* Copyright (c) 1998, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "code/codeBlob.hpp"
#include "code/codeCache.hpp"
#include "code/relocInfo.hpp"
#include "code/vtableStubs.hpp"
#include "compiler/disassembler.hpp"
#include "compiler/oopMap.hpp"
#include "cppstdlib/type_traits.hpp"
#include "interpreter/bytecode.hpp"
#include "interpreter/interpreter.hpp"
#include "jvm.h"
#include "memory/allocation.inline.hpp"
#include "memory/heap.hpp"
#include "memory/resourceArea.hpp"
#include "oops/oop.inline.hpp"
#include "prims/forte.hpp"
#include "prims/jvmtiExport.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/javaFrameAnchor.hpp"
#include "runtime/jniHandles.inline.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubCodeGenerator.hpp"
#include "runtime/stubRoutines.hpp"
#include "runtime/vframe.hpp"
#include "services/memoryService.hpp"
#include "utilities/align.hpp"
#ifdef COMPILER1
#include "c1/c1_Runtime1.hpp"
#endif
// Virtual methods are not allowed in code blobs to simplify caching compiled code.
// Check all "leaf" subclasses of CodeBlob class.
static_assert(!std::is_polymorphic<nmethod>::value, "no virtual methods are allowed in nmethod");
static_assert(!std::is_polymorphic<AdapterBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<VtableBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<MethodHandlesAdapterBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<RuntimeStub>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<DeoptimizationBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<SafepointBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<UpcallStub>::value, "no virtual methods are allowed in code blobs");
#ifdef COMPILER2
static_assert(!std::is_polymorphic<ExceptionBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<UncommonTrapBlob>::value, "no virtual methods are allowed in code blobs");
#endif
// Add proxy vtables.
// We need only few for now - they are used only from prints.
const nmethod::Vptr nmethod::_vpntr;
const BufferBlob::Vptr BufferBlob::_vpntr;
const RuntimeStub::Vptr RuntimeStub::_vpntr;
const SingletonBlob::Vptr SingletonBlob::_vpntr;
const DeoptimizationBlob::Vptr DeoptimizationBlob::_vpntr;
#ifdef COMPILER2
const ExceptionBlob::Vptr ExceptionBlob::_vpntr;
#endif // COMPILER2
const UpcallStub::Vptr UpcallStub::_vpntr;
const CodeBlob::Vptr* CodeBlob::vptr(CodeBlobKind kind) {
constexpr const CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = {
nullptr/* None */,
&nmethod::_vpntr,
&BufferBlob::_vpntr,
&AdapterBlob::_vpntr,
&VtableBlob::_vpntr,
&MethodHandlesAdapterBlob::_vpntr,
&RuntimeStub::_vpntr,
&DeoptimizationBlob::_vpntr,
&SafepointBlob::_vpntr,
#ifdef COMPILER2
&ExceptionBlob::_vpntr,
&UncommonTrapBlob::_vpntr,
#endif
&UpcallStub::_vpntr
};
return array[(size_t)kind];
}
const CodeBlob::Vptr* CodeBlob::vptr() const {
return vptr(_kind);
}
unsigned int CodeBlob::align_code_offset(int offset) {
// align the size to CodeEntryAlignment
int header_size = (int)CodeHeap::header_size();
return align_up(offset + header_size, CodeEntryAlignment) - header_size;
}
// This must be consistent with the CodeBlob constructor's layout actions.
unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
// align the size to CodeEntryAlignment
unsigned int size = align_code_offset(header_size);
size += align_up(cb->total_content_size(), oopSize);
size += align_up(cb->total_oop_size(), oopSize);
return size;
}
CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
int mutable_data_size) :
_oop_maps(nullptr), // will be set by set_oop_maps() call
_name(name),
_mutable_data(header_begin() + size), // default value is blob_end()
_size(size),
_relocation_size(align_up(cb->total_relocation_size(), oopSize)),
_content_offset(CodeBlob::align_code_offset(header_size)),
_code_offset(_content_offset + cb->total_offset_of(cb->insts())),
_data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
_frame_size(frame_size),
_mutable_data_size(mutable_data_size),
S390_ONLY(_ctable_offset(0) COMMA)
_header_size(header_size),
_frame_complete_offset(frame_complete_offset),
_kind(kind),
_caller_must_gc_arguments(caller_must_gc_arguments)
{
assert(is_aligned(_size, oopSize), "unaligned size");
assert(is_aligned(header_size, oopSize), "unaligned size");
assert(is_aligned(_relocation_size, oopSize), "unaligned size");
assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod");
assert(code_end() == content_end(), "must be the same - see code_end()");
#ifdef COMPILER1
// probably wrong for tiered
assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
#endif // COMPILER1
if (_mutable_data_size > 0) {
_mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
if (_mutable_data == nullptr) {
vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
}
} else {
// We need unique and valid not null address
assert(_mutable_data == blob_end(), "sanity");
}
set_oop_maps(oop_maps);
}
// Simple CodeBlob used for simple BufferBlob.
CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) :
_oop_maps(nullptr),
_name(name),
_mutable_data(header_begin() + size), // default value is blob_end()
_size(size),
_relocation_size(0),
_content_offset(CodeBlob::align_code_offset(header_size)),
_code_offset(_content_offset),
_data_offset(size),
_frame_size(0),
_mutable_data_size(0),
S390_ONLY(_ctable_offset(0) COMMA)
_header_size(header_size),
_frame_complete_offset(CodeOffsets::frame_never_safe),
_kind(kind),
_caller_must_gc_arguments(false)
{
assert(is_aligned(size, oopSize), "unaligned size");
assert(is_aligned(header_size, oopSize), "unaligned size");
assert(_mutable_data == blob_end(), "sanity");
}
void CodeBlob::restore_mutable_data(address reloc_data) {
// Relocation data is now stored as part of the mutable data area; allocate it before copy relocations
if (_mutable_data_size > 0) {
_mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
if (_mutable_data == nullptr) {
vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
}
} else {
_mutable_data = blob_end(); // default value
}
if (_relocation_size > 0) {
assert(_mutable_data_size > 0, "relocation is part of mutable data section");
memcpy((address)relocation_begin(), reloc_data, relocation_size());
}
}
void CodeBlob::purge() {
assert(_mutable_data != nullptr, "should never be null");
if (_mutable_data != blob_end()) {
os::free(_mutable_data);
_mutable_data = blob_end(); // Valid not null address
_mutable_data_size = 0;
_relocation_size = 0;
}
if (_oop_maps != nullptr) {
delete _oop_maps;
_oop_maps = nullptr;
}
NOT_PRODUCT(_asm_remarks.clear());
NOT_PRODUCT(_dbg_strings.clear());
}
void CodeBlob::set_oop_maps(OopMapSet* p) {
// Danger Will Robinson! This method allocates a big
// chunk of memory, its your job to free it.
if (p != nullptr) {
_oop_maps = ImmutableOopMapSet::build_from(p);
} else {
_oop_maps = nullptr;
}
}
const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
assert(_oop_maps != nullptr, "nope");
return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
}
void CodeBlob::print_code_on(outputStream* st) {
ResourceMark m;
Disassembler::decode(this, st);
}
void CodeBlob::prepare_for_archiving_impl() {
set_name(nullptr);
_oop_maps = nullptr;
_mutable_data = nullptr;
#ifndef PRODUCT
asm_remarks().clear();
dbg_strings().clear();
#endif /* PRODUCT */
}
void CodeBlob::prepare_for_archiving() {
vptr(_kind)->prepare_for_archiving(this);
}
void CodeBlob::archive_blob(CodeBlob* blob, address archive_buffer) {
blob->copy_to(archive_buffer);
CodeBlob* archived_blob = (CodeBlob*)archive_buffer;
archived_blob->prepare_for_archiving();
}
void CodeBlob::post_restore_impl() {
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
}
void CodeBlob::post_restore() {
vptr(_kind)->post_restore(this);
}
CodeBlob* CodeBlob::restore(address code_cache_buffer,
const char* name,
address archived_reloc_data,
ImmutableOopMapSet* archived_oop_maps)
{
copy_to(code_cache_buffer);
CodeBlob* code_blob = (CodeBlob*)code_cache_buffer;
code_blob->set_name(name);
code_blob->restore_mutable_data(archived_reloc_data);
code_blob->set_oop_maps(archived_oop_maps);
return code_blob;
}
CodeBlob* CodeBlob::create(CodeBlob* archived_blob,
const char* name,
address archived_reloc_data,
ImmutableOopMapSet* archived_oop_maps
)
{
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
CodeCache::gc_on_allocation();
CodeBlob* blob = nullptr;
unsigned int size = archived_blob->size();
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
address code_cache_buffer = (address)CodeCache::allocate(size, CodeBlobType::NonNMethod);
if (code_cache_buffer != nullptr) {
blob = archived_blob->restore(code_cache_buffer,
name,
archived_reloc_data,
archived_oop_maps);
assert(blob != nullptr, "sanity check");
// Flush the code block
ICache::invalidate_range(blob->code_begin(), blob->code_size());
CodeCache::commit(blob); // Count adapters
}
}
if (blob != nullptr) {
blob->post_restore();
}
return blob;
}
//-----------------------------------------------------------------------------------------
// Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.
RuntimeBlob::RuntimeBlob(
const char* name,
CodeBlobKind kind,
CodeBuffer* cb,
int size,
uint16_t header_size,
int16_t frame_complete,
int frame_size,
OopMapSet* oop_maps,
bool caller_must_gc_arguments)
: CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments,
align_up(cb->total_relocation_size(), oopSize))
{
cb->copy_code_and_locs_to(this);
}
void RuntimeBlob::free(RuntimeBlob* blob) {
assert(blob != nullptr, "caller must check for nullptr");
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
blob->purge();
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
CodeCache::free(blob);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
}
void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
// Do not hold the CodeCache lock during name formatting.
assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
if (stub != nullptr && (PrintStubCode ||
Forte::is_enabled() ||
JvmtiExport::should_post_dynamic_code_generated())) {
char stub_id[256];
assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
if (PrintStubCode) {
ttyLocker ttyl;
tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
Disassembler::decode(stub->code_begin(), stub->code_end(), tty
NOT_PRODUCT(COMMA &stub->asm_remarks()));
if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
stub->oop_maps()->print();
}
tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
tty->cr();
}
if (Forte::is_enabled()) {
Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
}
if (JvmtiExport::should_post_dynamic_code_generated()) {
const char* stub_name = name2;
if (name2[0] == '\0') stub_name = name1;
JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
}
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
}
//----------------------------------------------------------------------------------------------------
// Implementation of BufferBlob
BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size)
: RuntimeBlob(name, kind, size, header_size)
{}
BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
BufferBlob* blob = nullptr;
unsigned int size = sizeof(BufferBlob);
// align the size to CodeEntryAlignment
size = CodeBlob::align_code_offset(size);
size += align_up(buffer_size, oopSize);
assert(name != nullptr, "must provide a name");
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size)
: RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr)
{}
// Used by gtest
BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
BufferBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
assert(name != nullptr, "must provide a name");
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
void* BufferBlob::operator new(size_t s, unsigned size) throw() {
return CodeCache::allocate(size, CodeBlobType::NonNMethod);
}
void BufferBlob::free(BufferBlob *blob) {
RuntimeBlob::free(blob);
}
//----------------------------------------------------------------------------------------------------
// Implementation of AdapterBlob
AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) :
BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, sizeof(AdapterBlob)) {
assert(entry_offset[I2C] == 0, "sanity check");
#ifdef ASSERT
for (int i = 1; i < AdapterBlob::ENTRY_COUNT; i++) {
// The entry is within the adapter blob or unset.
int offset = entry_offset[i];
assert((offset > 0 && offset < cb->insts()->size()) ||
(i >= C2I_No_Clinit_Check && offset == -1),
"invalid entry offset[%d] = 0x%x", i, offset);
}
#endif // ASSERT
_c2i_offset = entry_offset[C2I];
_c2i_unverified_offset = entry_offset[C2I_Unverified];
_c2i_no_clinit_check_offset = entry_offset[C2I_No_Clinit_Check];
CodeCache::commit(this);
}
AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
CodeCache::gc_on_allocation();
AdapterBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) AdapterBlob(size, cb, entry_offset);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of VtableBlob
void* VtableBlob::operator new(size_t s, unsigned size) throw() {
// Handling of allocation failure stops compilation and prints a bunch of
// stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
// can be locked, and then re-locking the CodeCache_lock. That is not safe in
// this context as we hold the CompiledICLocker. So we just don't handle code
// cache exhaustion here; we leave that for a later allocation that does not
// hold the CompiledICLocker.
return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
}
VtableBlob::VtableBlob(const char* name, int size) :
BufferBlob(name, CodeBlobKind::Vtable, size) {
}
VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
VtableBlob* blob = nullptr;
unsigned int size = sizeof(VtableBlob);
// align the size to CodeEntryAlignment
size = align_code_offset(size);
size += align_up(buffer_size, oopSize);
assert(name != nullptr, "must provide a name");
{
if (!CodeCache_lock->try_lock()) {
// If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
// IC transition to megamorphic, for which this stub will be needed. It is better to
// bail out the transition, and wait for a more opportune moment. Not only is it not
// worth waiting for the lock blockingly for the megamorphic transition, it might
// also result in a deadlock to blockingly wait, when concurrent class unloading is
// performed. At this point in time, the CompiledICLocker is taken, so we are not
// allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
// consistently taken in the opposite order. Bailing out results in an IC transition to
// the clean state instead, which will cause subsequent calls to retry the transitioning
// eventually.
return nullptr;
}
blob = new (size) VtableBlob(name, size);
CodeCache_lock->unlock();
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of MethodHandlesAdapterBlob
MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
MethodHandlesAdapterBlob* blob = nullptr;
unsigned int size = sizeof(MethodHandlesAdapterBlob);
// align the size to CodeEntryAlignment
size = CodeBlob::align_code_offset(size);
size += align_up(buffer_size, oopSize);
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) MethodHandlesAdapterBlob(size);
if (blob == nullptr) {
vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
}
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of RuntimeStub
RuntimeStub::RuntimeStub(
const char* name,
CodeBuffer* cb,
int size,
int16_t frame_complete,
int frame_size,
OopMapSet* oop_maps,
bool caller_must_gc_arguments
)
: RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
{
}
RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
CodeBuffer* cb,
int16_t frame_complete,
int frame_size,
OopMapSet* oop_maps,
bool caller_must_gc_arguments,
bool alloc_fail_is_fatal)
{
RuntimeStub* stub = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
if (stub == nullptr) {
if (!alloc_fail_is_fatal) {
return nullptr;
}
fatal("Initial size of CodeCache is too small");
}
}
trace_new_stub(stub, "RuntimeStub - ", stub_name);
return stub;
}
void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
return CodeCache::allocate(size, CodeBlobType::NonNMethod);
}
// operator new shared by all singletons:
void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
return p;
}
//----------------------------------------------------------------------------------------------------
// Implementation of DeoptimizationBlob
DeoptimizationBlob::DeoptimizationBlob(
CodeBuffer* cb,
int size,
OopMapSet* oop_maps,
int unpack_offset,
int unpack_with_exception_offset,
int unpack_with_reexecution_offset,
int frame_size
)
: SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
{
_unpack_offset = unpack_offset;
_unpack_with_exception = unpack_with_exception_offset;
_unpack_with_reexecution = unpack_with_reexecution_offset;
#ifdef COMPILER1
_unpack_with_exception_in_tls = -1;
#endif
}
DeoptimizationBlob* DeoptimizationBlob::create(
CodeBuffer* cb,
OopMapSet* oop_maps,
int unpack_offset,
int unpack_with_exception_offset,
int unpack_with_reexecution_offset,
int frame_size)
{
DeoptimizationBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) DeoptimizationBlob(cb,
size,
oop_maps,
unpack_offset,
unpack_with_exception_offset,
unpack_with_reexecution_offset,
frame_size);
}
trace_new_stub(blob, "DeoptimizationBlob");
return blob;
}
#ifdef COMPILER2
//----------------------------------------------------------------------------------------------------
// Implementation of UncommonTrapBlob
UncommonTrapBlob::UncommonTrapBlob(
CodeBuffer* cb,
int size,
OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
{}
UncommonTrapBlob* UncommonTrapBlob::create(
CodeBuffer* cb,
OopMapSet* oop_maps,
int frame_size)
{
UncommonTrapBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
}
trace_new_stub(blob, "UncommonTrapBlob");
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of ExceptionBlob
ExceptionBlob::ExceptionBlob(
CodeBuffer* cb,
int size,
OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
size, sizeof(ExceptionBlob), frame_size, oop_maps)
{}
ExceptionBlob* ExceptionBlob::create(
CodeBuffer* cb,
OopMapSet* oop_maps,
int frame_size)
{
ExceptionBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
}
trace_new_stub(blob, "ExceptionBlob");
return blob;
}
#endif // COMPILER2
//----------------------------------------------------------------------------------------------------
// Implementation of SafepointBlob
SafepointBlob::SafepointBlob(
CodeBuffer* cb,
int size,
OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
size, sizeof(SafepointBlob), frame_size, oop_maps)
{}
SafepointBlob* SafepointBlob::create(
CodeBuffer* cb,
OopMapSet* oop_maps,
int frame_size)
{
SafepointBlob* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
}
trace_new_stub(blob, "SafepointBlob");
return blob;
}
//----------------------------------------------------------------------------------------------------
// Implementation of UpcallStub
UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
CodeOffsets::frame_never_safe, 0 /* no frame size */,
/* oop maps = */ nullptr, /* caller must gc arguments = */ false),
_receiver(receiver),
_frame_data_offset(frame_data_offset)
{
CodeCache::commit(this);
}
void* UpcallStub::operator new(size_t s, unsigned size) throw() {
return CodeCache::allocate(size, CodeBlobType::NonNMethod);
}
UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
UpcallStub* blob = nullptr;
unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
{
MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
}
if (blob == nullptr) {
return nullptr; // caller must handle this
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
trace_new_stub(blob, "UpcallStub - ", name);
return blob;
}
void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
frame_data_for_frame(frame)->old_handles->oops_do(f);
}
JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
return &frame_data_for_frame(frame)->jfa;
}
void UpcallStub::free(UpcallStub* blob) {
assert(blob != nullptr, "caller must check for nullptr");
JNIHandles::destroy_global(blob->receiver());
RuntimeBlob::free(blob);
}
//----------------------------------------------------------------------------------------------------
// Verification and printing
void CodeBlob::verify() {
if (is_nmethod()) {
as_nmethod()->verify();
}
}
void CodeBlob::print_on(outputStream* st) const {
vptr()->print_on(this, st);
}
void CodeBlob::print() const { print_on(tty); }
void CodeBlob::print_value_on(outputStream* st) const {
vptr()->print_value_on(this, st);
}
void CodeBlob::print_on_impl(outputStream* st) const {
st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this));
st->print_cr("Framesize: %d", _frame_size);
}
void CodeBlob::print_value_on_impl(outputStream* st) const {
st->print_cr("[CodeBlob]");
}
void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
#if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
if (is_nmethod()) {
as_nmethod()->print_nmethod_labels(stream, block_begin);
}
#endif
#ifndef PRODUCT
ptrdiff_t offset = block_begin - code_begin();
assert(offset >= 0, "Expecting non-negative offset!");
_asm_remarks.print(uint(offset), stream);
#endif
}
void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
// the interpreter is generated into a buffer blob
InterpreterCodelet* i = Interpreter::codelet_containing(addr);
if (i != nullptr) {
st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
i->print_on(st);
return;
}
if (Interpreter::contains(addr)) {
st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
" (not bytecode specific)", p2i(addr));
return;
}
//
if (AdapterHandlerLibrary::contains(this)) {
st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
AdapterHandlerLibrary::print_handler_on(st, this);
}
// the stubroutines are generated into a buffer blob
StubCodeDesc* d = StubCodeDesc::desc_for(addr);
if (d != nullptr) {
st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
d->print_on(st);
st->cr();
return;
}
if (StubRoutines::contains(addr)) {
st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
return;
}
VtableStub* v = VtableStubs::stub_containing(addr);
if (v != nullptr) {
st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
v->print_on(st);
st->cr();
return;
}
}
if (is_nmethod()) {
nmethod* nm = (nmethod*)this;
ResourceMark rm;
st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
if (verbose) {
st->print(" for ");
nm->method()->print_value_on(st);
}
st->cr();
if (verbose && st == tty) {
// verbose is only ever true when called from findpc in debug.cpp
nm->print_nmethod(true);
} else {
nm->print_on(st);
nm->print_code_snippet(st, addr);
}
return;
}
st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
print_on(st);
}
void BufferBlob::print_on_impl(outputStream* st) const {
RuntimeBlob::print_on_impl(st);
print_value_on_impl(st);
}
void BufferBlob::print_value_on_impl(outputStream* st) const {
st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
}
void RuntimeStub::print_on_impl(outputStream* st) const {
ttyLocker ttyl;
RuntimeBlob::print_on_impl(st);
st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
st->print_cr("%s", name());
Disassembler::decode((RuntimeBlob*)this, st);
}
void RuntimeStub::print_value_on_impl(outputStream* st) const {
st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
}
void SingletonBlob::print_on_impl(outputStream* st) const {
ttyLocker ttyl;
RuntimeBlob::print_on_impl(st);
st->print_cr("%s", name());
Disassembler::decode((RuntimeBlob*)this, st);
}
void SingletonBlob::print_value_on_impl(outputStream* st) const {
st->print_cr("%s", name());
}
void DeoptimizationBlob::print_value_on_impl(outputStream* st) const {
st->print_cr("Deoptimization (frame not available)");
}
void UpcallStub::print_on_impl(outputStream* st) const {
RuntimeBlob::print_on_impl(st);
print_value_on_impl(st);
st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
oop recv = JNIHandles::resolve(_receiver);
st->print("Receiver MH=");
recv->print_on(st);
Disassembler::decode((RuntimeBlob*)this, st);
}
void UpcallStub::print_value_on_impl(outputStream* st) const {
st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
}
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